<template>
  <div />
</template>
<script>

export default {
  name: 'AgencyTree',
  data() {
    return {

    }
  },
  watch: {

  },
  created() {

  },
  methods: {
    // 拖拽
    dragControllerDiv() {
      var resize = document.getElementsByClassName('resize')
      var left = document.getElementsByClassName('left')
      var mid = document.getElementsByClassName('mid')
      var box = document.getElementsByClassName('box')
      for (let i = 0; i < resize.length; i++) {
        // 鼠标按下事件
        resize[i].onmousedown = function(e) {
          // 颜色改变提醒
          resize[i].style.background = '#818181'
          var startX = e.clientX
          resize[i].left = resize[i].offsetLeft
          // 鼠标拖动事件
          document.onmousemove = function(e) {
            var endX = e.clientX
            var moveLen = resize[i].left + (endX - startX) // （endx-startx）=移动的距离。resize[i].left+移动的距离=左边区域最后的宽度
            var maxT = box[i].clientWidth - resize[i].offsetWidth // 容器宽度 - 左边区域的宽度 = 右边区域的宽度

            if (moveLen < 32) moveLen = 32 // 左边区域的最小宽度为32px
            if (moveLen > maxT - 150) moveLen = maxT - 150 // 右边区域最小宽度为150px

            resize[i].style.left = moveLen // 设置左侧区域的宽度

            for (let j = 0; j < left.length; j++) {
              const dragWidth = moveLen / box[i].clientWidth * 100
              left[j].style.width = dragWidth + '%'
              mid[j].style.width = (100 - dragWidth - 1) + '%'
              // left[j].style.width = moveLen + 'px'
              // mid[j].style.width = box[i].clientWidth - moveLen - 10 + 'px'
            }
          }
          // 鼠标松开事件
          document.onmouseup = function(evt) {
            // 颜色恢复
            resize[i].style.background = '#d6d6d6'
            document.onmousemove = null
            document.onmouseup = null
            resize[i].releaseCapture && resize[i].releaseCapture() // 当你不在需要继续获得鼠标消息就要应该调用ReleaseCapture()释放掉
          }
          resize[i].setCapture && resize[i].setCapture() // 该函数在属于当前线程的指定窗口里设置鼠标捕获
          return false
        }
      }
    }
  }
}
</script>
